Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first opportunity to plant sweet corn in Marathon can be estimated by referring to the USDA zone info.

Planting Calendar for Sweet corn

Frost tolerance for sweet corn:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since sweet corn are one of those plants that can tolerate a tiny bit of cold weather you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant sweet corn in Marathon is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant sweet corn and expect a good harvest is probably November. If you wait any later than that and your sweet corn may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your sweet corn indoors.

Last Frost Date

In Marathon it never frosts. You should expect an average low temperature of 45°F in the coldest months of winter.

It's important to remember that USDA zone info for Marathon is just an average and the actual date of last frost changes from year to year. Since it never frosts in Marathon you do not have to be ready to cover your sweet corn in the event of a surprise late frost.

USDA Zone Info for Marathon

Here is the info for USDA Zone 11b.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	45°F
Highest Expected Low	50°F

This means that on a really cold year, the coldest it will get is 45°F. On most years you should be prepared to experience lows near 50°F.

Plants to Grow in Marathon

You may be interested in your other planting guides for Marathon.